Merge pull request #10 from CarlKenner/master

dylanwinn's FreeTrack and Baristan6's FreePIE trackers added
Changed SocketTracker to SharedMemoryTracker
Changed SocketTracker to SharedMemoryTracker.
Merge pull request #11 from Baristan6/master

Changed SocketTracker to SharedMemoryTracker
add instructions for Dirt 2
Merge branch 'master' of https://github.com/Baristan6/Perception